Question 162530
A=bh
A= 45
a=x+1
b=2x+1
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45=(x+1)(2x+1)
{{{2x^2+3x+1=45}}}
{{{2x^2+3x-44=0}}}
(2x+11)(x-4)=0
2x+11=0
2x=-11 - can't have a negative side
x=-11/2
x-4=0
x=4 - answer
Check;
{{{2(4)^2+3(4)+1=45}}}
32+12+1=45
:)